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The curve for E. coli is given in the figure, with the most effective UV light having a wavelength of 265 nm. This applies to most bacteria and does not change significantly for other microbes. Dosages for a 90% kill rate of most bacteria and viruses range between 2,000 and 8,000 μJ/cm 2 .
The National Grassland consists of about 100 tracts of land interspaced with privately owned ranchland. It is located in the mixed grass prairie region. The terrain is characterized by sandy and red slate hills in addition to grassland and oak brush. The creek bottoms are wooded with cottonwood, elm, and hackberry. Wildlife includes white ...
Grass: Indian grass (Sorghastrum nutans) SCR72, 1972 Flower: Oklahoma rose 25 O.S.3§92, 2004 Vegetable: Watermelon: 25 OS § 98.15,2007 Fauna Bird: Scissor-tailed flycatcher (Muscivora forficata) 25 O.S.3§98, 1951 Reptile: Collared lizard (mountain boomer Crotaphytus collaris) HCR1009, 1969 Mammal: Buffalo (Bison bison) SCR101, 1972 Fish
State grass Scientific name Image Year adopted California: Purple needlegrass: Nassella pulchra: 2004 [1] Colorado: Blue grama: Bouteloua gracilis: 1987 [2] Illinois: Big bluestem (state prairie grass) Andropogon gerardii: 1989 [3] Kansas: Little bluestem: Schizachyrium scoparium (Andropogon scoparius) 2010 [4] Minnesota: Wild rice (state grain ...
Putting a non-microwave-safe material in a microwave oven can lead to chemicals leaching into your food (not good) or the melting of the container, which can lead to burns — or, at the very ...
The city said the spill killed 25 to 50 small fish and produced “high levels” of E.coli ... the retention pond near the intersection of East Gentry Boulevard and Ind. 446, and that testing on ...
Flowering big bluestem, a characteristic tallgrass prairie plant. The tallgrass prairie is an ecosystem native to central North America.Historically, natural and anthropogenic fire, as well as grazing by large mammals (primarily bison) provided periodic disturbances to these ecosystems, limiting the encroachment of trees, recycling soil nutrients, and facilitating seed dispersal and germination.
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